People walk away from inside a police cordon after an incident in London, Sunday, June 4, 2017. A vehicle veered off the road and mowed down pedestrians on London Bridge, turning a summery Saturday night into a scene of panic and chaos. (AP Photo/Matt Dunham)

(Matt Dunham/AP)

Police patrol nears bags of evidence collected on the streets in the London Bridge area of London, Sunday, June 4, 2017.

(Frank Augstein/AP)

Armed police on St Thomas Street, London, Sunday June 4, 2017, near the scene of Saturday night's terrorist incident on London Bridge and at Borough Market.

(Dominic Lipinski/AP)

A woman wipes her face as she carries flowers to London Bridge, the scene of last night's terror attack on June 4, 2017 in London, England.

(Dan Kitwood/Getty Images)

Members of the public leave the area at London Bridge on June 3, 2017 in London, England.

(Dan Kitwood/Getty Images)

People run down Borough High Street as police are dealing with a "major incident" at London Bridge in London, Saturday, June 3, 2017.

(Dominic Lipinski/AP)

Members of the public, wrapped in emergency blankets leave the scene of a terror attack on London Bridge in central London on June 3, 2017.

(Chris Ratcliffe/AFP/Getty Images)

People with their hands on their heads about 10 minutes after midnight as they leave from inside a police cordon after an attack in London, Sunday, June 4, 2017.

(Matt Dunham/AP)

Members of the public leave the scene of a terror attack on London Bridge in central London on June 3, 2017.

(Daniel Sorabji/AFP/Getty Images)

People walk away about 10 minutes after midnight from inside a police cordon after an attack in London, Sunday, June 4, 2017.

(Matt Dunham/AP)

Members of the public are led away from the scene near London Bridge after a suspected terrorist attack on June 4, 2017 in London, England.

(Dan Kitwood/Getty Images)

Police at the scene at Southwark Bridge after an attack on London Bridge on June 4, 2017 in London, England.

(Carl Court/Getty Images)

Police and members of the emergency services attend to victims of a terror attack on London Bridge in central London on June 3, 2017.

(Daniel Sorabji/AFP/Getty Images)

People are lead to safety on Southwark Bridge away from London Bridge after an attack on June 4, 2017 in London, England.

(Carl Court/Getty Images)

People walk away about 10 minutes after midnight from inside a police cordon after an attack in London, Sunday, June 4, 2017.

(Matt Dunham/AP)

A woman sunbathes as police officers patrol around Old Trafford Cricket Ground ahead of the One Love Manchester tribute concert in Manchester on June 4, 2017.

(ANTHONY DEVLIN/AFP/Getty Images)

7 killed in London terror attack

The attack started when a van plowed into pedestrians on the London Bridge shortly after 10 p.m. London time. The van then drove to the Borough Market less than a half mile away where authorities say three men got out of the van and started stabbing pedestrians.

The Metropolitan Police Service has characterized what happened at the London Bridge and Borough Market as "terrorist incidents."

Lightning bolts fill the sky over highway 360 near Euless, Texas on Friday, June 2, 2017.

(Ryan Michalesko/Staff Photographer)

First responders work to make entry into a car after it was found in flood waters near the Trinity River in Dallas' Cadillac Heights on Sunday, June 4, 2017.

(Ryan Michalesko/Staff Photographer)

Kathleen and Loren Schiele wade through floodwaters over Goforth Road near White Rock Creek after a period of heavy rain in Dallas, Texas on Friday, Jun 2, 2017.

(Ryan Michalesko/Staff Photographer)

Water flows over West Lawther Drive near White Rock Creek after a period of heavy rain in Dallas, Texas on Friday, Jun 2, 2017.

(Ryan Michalesko/Staff Photographer)

Pedestrians take cover from a heavy downpour as they cross Elm St. in downtown Dallas, Friday, June 2, 2017.

(Tom Fox/Staff Photographer)

After flooding rains ran two feet through their store, employees of LED King along the I-35 near Royal Lane in Dallas mop up the remains, Friday, June 2, 2017.

(Tom Fox/Staff Photographer)

After flooding rains, two cars and a UPS truck were stalled in high water along the I-35 northbound service road near Royal Lane in Northwest Dallas, Friday, June 2, 2017. Everyone got out ok after water was up over the hoods.

(Tom Fox/Staff Photographer)

A truck drives through high water during a thunderstorm in the 2800 block of Brown Trail in Bedford, Texas on Friday, June 2, 2017.

(David Woo/Staff Photographer)

Veronica Lewis of Dallas finds shelter from a quick downpour at the Apple store on Knox St. in Dallas on Friday, June 2, 2017.

(David Woo/Staff Photographer)

Alex Hixson, 17, right, gets help from strangers, Aaron Dodson, 22, center, and Sheamus Schiller, 14, after Alex drove his car into high water after thunderstorms in the 2800 block of Brown Trail in Bedford, Texas on Friday, June 2, 2017.

(David Woo/Staff Photographer)

Ebony Green, right, walks her daughter Amaris Dobbins, 13, back to their apartment on Thursday, June 2, 2017 in Dallas. They are receiving assistance from the Morning Star Family Foundation with their housing expenses.

(David Woo/Staff Photographer)

Dallas Baptist players scoop water off the field from the dugout during a rain delay before their NCAA Fort Worth Regional game against Virginia starts at Lupton Stadium in Fort Worth, Texas, Saturday, June 3, 2017.

(Jae S. Lee/Staff Photographer)

A baseball fan is reflected in a puddle left by a morning rain at Lupton Stadium in Fort Worth, Texas, Saturday, June 3, 2017. The NCAA Fort Worth Regional game between Virginia and Dallas Baptist is under a rain delay.

(Jae S. Lee/Staff Photographer)

Members of the TCU ground crew pull a tarp before the Virginia and Dallas Baptist game starts during a rain delay in the NCAA Fort Worth Regional at Lupton Stadium in Fort Worth, Texas, Saturday, June 3, 2017.

(Jae S. Lee/Staff Photographer)

Dallas Baptist pitcher Seth Elledge lies on the ground under the stand during a rain delay in the NCAA Fort Worth Regional game against Virginia at Lupton Stadium in Fort Worth, Texas, Friday, June 2, 2017.

(Jae S. Lee/Staff Photographer)

Dallas Baptist players wait under the stand during a rain delay in the NCAA Fort Worth Regional game against Virginia at Lupton Stadium in Fort Worth, Texas, Friday, June 2, 2017.

(Jae S. Lee/Staff Photographer)

Roy Eon of Keller rushes up the stairs for cover as rain begins to fall again prior to a game between the Texas Rangers and Houston Astros at Globe Life Park in Arlington on Friday, June 2, 2017.

(Vernon Bryant/Staff Photographer)

Fans checkout the ballpark an hour before the planned start of a game between the Texas Rangers and Houston Astros at Globe Life Park in Arlington on Friday, June 2, 2017.

(Vernon Bryant/Staff Photographer)

In photos: Dallas' soggy weekend

Storms that drenched the region on Friday and Saturday are expected to continue throughout Sunday.

A strong storm system brought heavy rain to D-FW on Friday afternoon, backing up rush-hour traffic and stranding motorists as water quickly rose on roads.

During Friday's storms, 5.7 inches of rain fell at Walnut Hill Lane in Preston Hollow, the most in Dallas County. Additional rains arrived on Saturday, and meteorologists say that heavy storms are likely again on Sunday.

☔ Remember to pack your umbrella and stay dry!

Dallas Cowboys quarterback Dak Prescott performs the scarfing ceremony before the MLS soccer game between FC Dallas and Real Salt Lake at the Toyota Stadium in Frisco, Texas on June 3, 2017. At every home stand, a special guest adorns the statue of Lamar Hunt with an FC Dallas scarf.